Affiliation: | [1]Key Laboratory of Crop Nutrition and Fertilization, Ministry of Agriculture~Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China [2]Sustainable Soils and Grassland Systems Department, Rothamsted Research, Okehampton EX20 2SB, UK [3]Department of Botany and Microbiology, University of Oklahoma, Norman OK 73019, USA |